HDWA-SVX001D-EN
55
Normal Shutdown to Stopped or Run
Inhibit
The following figure shows the transition from running
through a normal (friendly) shutdown. The dashed
lines on the top indicate the final mode if the stop is
entered via various inputs.
Figure 39.
Sequence of events: normal shutdown to stopped or run inhibit
Local Stop
Normal Latching Diagnostic
Normal Non-Latching Diagnostic
Tracer Stop
External Auto-Stop
IGV Closed
Evaporator Pump
Delay &
Compressor Stopped
Preparing Shutdown
Shutting Down
Stopped or
Run Inhibit
Command IGV
Closed
Close Economizer
Valve
De-Energize
Compressor
De-Energize Condenser
Water Pump Relay
De-Energize Evaporator
Water Pump Relay
Close Motor Cooling
Valve
Close Drive Cooling
Valve
De-levitate Magnetic
Bearings
Close MBC Cooling
Valve
Set Evaporator EXV
to 50%
Running
Stopped
Run Inhibit
Stopped
or
Run Inhibit
Close IGV (0 to 50 Seconds)
MBC Levitation Will Stop When
RPM < 1200 for 60 Seconds
Evaporator
Pump Off
Delay Time
(0 to 30 Minutes)
Every 24 hours, EXV
recalibration is armed.
Recalibration occurs
when it is armed and
control has cycled to
the stop state on every
power up.